Consider the reaction represented by the following equation: H2(g) + I2(g) → 2HI(g). The number of effective collisions of molecules of the reactants decreases as

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A. the temperature is raised
B. the pressure increased
C. the volume of the system is increased
D. a catalysty is intoduced into the system

Correct Answer:

Option C – the volume of the system is increased

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